Skip to content

Water Quality Report

Thomson, IL

Carroll County · 2,746 residents · 2 water systems

0

Contaminants detected

0

PFAS compounds

200

Hardness (mg/L)

0

Above legal limits

1

Above health guidelines

Thomson drinking water comes from groundwater wells. Based on the most recent monitoring data, 0 contaminants have been detected in the water supply. Water hardness is 200 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Limited monitoring data available

The water systems serving Thomson are small private systems (population served: 2,746) and are not part of Illinois EPA's main contaminant monitoring program. No detected contaminant data is available for these systems.

If you're researching the main municipal utility serving Thomson, search for your specific address below — the search returns the actual water system serving your residence, which may be different from what's listed here.

Water systems serving Thomson

THOMSON MAXIMUM SECURITY CENTER

2,166 servedGroundwater0 contaminants
View →

THOMSON

580 servedGroundwater0 contaminants1 above guideline
View →

Other cities in Carroll County

Water quality reports for nearby Illinois communities.

ChadwickLanarkMilledgevilleMount CarrollSavannaShannon

Frequently asked questions

Is Thomson, IL tap water safe to drink?
Thomson tap water meets EPA legal standards (Maximum Contaminant Levels). However, 1 contaminant is present above independent health guidelines, which are often stricter than legal limits. 0 contaminants have been detected in the water supply, including . View the detailed report for each water system to see specific levels and how they compare to both legal limits and health guidelines.
What contaminants are in Thomson water?
Monitoring has detected 0 contaminants in Thomson's water supply: . 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Is Thomson water hard?
Yes. Thomson water has a hardness of 200 mg/L (very hard). Hard water is not a health concern but can cause scale buildup in water heaters and appliances, reduce soap effectiveness, and leave mineral deposits. Water softeners or conditioning systems can address hardness.
Where does Thomson get its drinking water?
Thomson's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Thomson is served by 2 water systems, the largest being THOMSON MAXIMUM SECURITY CENTER (serving 2,166 people).

Check your water quality

Enter your address for a detailed report specific to your water system.

On a private well? Search your address for nearby groundwater monitoring data.

Free water assessment in Thomson.

Schedule an onsite consultation.

For my businessFor my home